Variable nose cam



May 6, 1930. M. c; HORINE. r I 1,757,046

VARIABLE NOSE CAM I Filed Feb. 27; 1929 2 Sheets-Sheet 1 l May 6, 193Q.M. c. HomE 1,757,046

VARIABLE NOSE CAM Filed Feb. 2'7, 1929 2 Sheets-Sheet 2 Patented May 6,1930 ATE QF f M-ERRILL gc) QRINE; 0F 'NEw"YoRiz,"-N; Y.,'AfssIGNoIt'roINTERNATIONAL MOTOR COMPANY, or NEw'YoR'K, .;Y,, A coRPoRATIo OFDELAWARE V VABIABVL'E Nose CAM,

Application. filed February'27, .1929. Seri al No, 342,043. I

The present invention 'relates to expanding or var able nose cams andembodies, more s aeclficall a cam the nose of whlch ma be 7 7 expandedor varied during the continuous operation of the cam withoutlnterrupting the function which it accomplishes.

In many instances it nis desirable tova ry the characteristics of a camduring the'operar' tion thereof This is particularly so'in 'connectionwith engines operatingat high speeds where the opening ofthe valves isrequired 7 to be of greater duration than the opening required for lowspeeds. It will thus beseen that it would be very desirable to have "acam nose of greater width for use during lilgh speeds than that for useunderilow speedfconditions. In low' speed engines, where jthe torque isgreat, the cam nose should'be narrow" to decrease thedurat1on;oftheopen1ng ofthe valves.

An object of during rotation thereof, thus not affecting the operationof the engine, and adapting the cam to the desired condition ofoperation.

A further object of the invention is toconnection which is operatedbyasliding rod within such driving part: By sliding the rod axially of thedriving part, the movable caln element can be rotated and advanced intoor away from the other element to vary the constructed in accordancewith the present invention, the nose thereof being adjusted to itssmallest width.

rotation.

the accom- Figure Q is an end view, taken from the-left inFigure 1,justed to its s'inallestwidth.

Q Figure3 is a view similar to'Figure 2 showingthe' cam nose expandedfrom the position shown 1nF1gure'2. v 1 f qFl'gure 4. IS a plan view,similar to F igure and showing; the cam nosea'd- 1, showing the cainnoseeXpandedas in .Fig- I V Referring to the above drawings, adesignates a driving sleeve to which is keyed, a i j V collar al,Abutting against the collar and the present invention is to provide acam which is automatically variable keyed to. the sleeve a, is a camsection b,-this section being formed of a hub b and a cam segment 5 Thecam section his keyed to the sleeve at, b and'the outer face, thereof ishelically formed as at b", as shownin Figure 7. The outer face mergesinto the outer edge of the cam segment b the latter being formed with agrooveb a Aligned with the canisection Z; is a cooperating cam section 0having a cam segment 0 This segment is formed with a tongue '0 thesegment and tongue being adjacent the helically formed face of the camsectionb.

The face 0 of the cam sectionjc is helically, formed to cooperate withthe corresponding face 12 of the cam section b. It will be seen thatrelative rotation of one section with respect to the other will advance,the tongue c into the groove I or retractthe sa1ne 'therefrominaccordanceWith the directionof such; V Such movement will be accompanied by a slight axial movement time of the sections with respect tothe other but the effective breadth of the will'not be. variedmaterially by suchmovement."

iFigures 2 and 3 illustrate the manner in which the cam nose may beexpanded orv aried and the meansffor efiecting such-ex pensionduringoperation of the cam will now be described. Within. the sleevefla, operat ing rod Z is sliclably mounted. A slot a lying in a radialplane of the shaft (Z is formed in the sleeve a and acnrved grooveation'of the device will be quiteapparent";

since axial movement of with respect to the driving sleeve acansesthekeyeto hem ved wi in the l t t uch m iement is purely axialwith respectto the sleeve a and cam section I h t nosefogt the key ag the erespondins s d f r e nd efies si elu rentia m em t the o with respect'tothe sleeve qi and'cam; section h rst-r lati e qta-tion b e n the am etenz e es ithe to e pa et a t the cam in accordance with the direction ofmovem n o h ha t- I Prec icath haft d m y b utoma al y I b in a cordancewith the speed of the engine; as by mean 'e a fl wh l r e h form of s ee p ns v -de i e 1 Although the invention has been described n oimec enwith th pec fi n tru e shown in the accompanying drawings; it is -HQ bel m ed, v a define in the ppe e d-e ai 1 '1 l sh m a m i vent m 1, Avariable nose cam comprising hole w ri ing m mbe e ativel eb e Cam felements mounted onthe driving member on of aidslem nt ein k ye to h d-l s member and the other provided with acurved sree mi nt rnalPeriphery e e i m eet ons n he' elem nts, an'exiel tending slot in thedriving member, an operinsre s t i n menb 'r d kev on the rod movable inthe slot and engaging the groove to vary the telescoping of the am S cton A vafahle nose cam comprising a holow dri ing me b a ax y end 10brelatively movable cam elements mounted on the driving member, onexofsaid elements being keyed to the drivingmember, opposed cam sections onthe elements, op-

' posed helical faces on the elements, a curved groQ-Ye the otherelement, an o erqri oain the,driving member, and a key on the ne rzti sred t e vable 2 t e s a a d 1 seems the e ,3. variable nose camcomprising a .hol-.

0w drivingmemher, an ax y exte ding.

a the ein, ela ively m wb ?e el ment wa e -a the se s memb r; nee $2 1 1m nts b ing ke to he r ng mem er h enien -seesaw;

groove in the other element, and a key on the operating rod movable inthe slot and engaging the groove.- I 4.]A variable nose cam comprising ahollow drivingmember, an axially extending slot therein, relativelymovablepam elements mounted the driving member, one of said elementsbeing keyed tothe drivingmember, 'oppos ed cam sections on the elements,an operating rod in the-driving member, and. a; connection iii-the slotbetweenthe rod and the other of said elements to move one of thecainsections circumferentially with resheet fie the e er: 7 I a 5'.'A'variable nose camcompri'sing a hol- QW: de ise m mbe a a m n lqr hme? sa e siedef ar mlity lativelyeev hl el ee e b n ed l e th rivi m mbr i s i sai l ment -b keyed $0, the driving member, an operatmg rod inthe driving- .membega movable key n the M ndi'ehgl si ie he 50 a d s are reeve e the ether ele i Q t e s e 6.- A r eble was em ess hel lowdrlylllg memb r, anhax aly eXi mli ri 1a th e n; scamerme f a plu ty 9frela i ely mete el ment m te driving-member, one off said elements being.7 ved fie t dri n lie reb s spewin rod :inthe, driving member, and,means in the to. o .drivh membe -Q hi ficfition signed mqvethe last'f idfelement w t at s.

23rd day of 1929. a j

ME RILL s re February, A.

sloteqnncting theother element'and.therogl

